Reference Number

ASTM D6836

Material

Soil

Test Property

Soil water characteristic curve

Description of Test

Methods A-C—Methods A-C yield soil water characteristic curves in terms of matric suction. Various suctions are applied to the soil and the corresponding water contents are measured. Two different procedures are used to apply the suction. In Method A, the matric suction is applied by reducing the pore water pressure while maintaining the pore gas pressure at the atmospheric condition. In Methods B and C, the pore water pressure is maintained at atmospheric pressure, and the pore gas pressure is raised to apply the suction via the axis translation principle.

Preferred Test Sample Size

Can be either disturbed (500 grams) or undisturbed (2" of Shelby tube),